Here is the full list of all 20 Angry Birds Space (Windows) achievements worth 200 gamerscore.
250 stars earned
6 pigs scared with one green bird
500 pigs freezed
Smash 500 000 blocks
Angry Birds Space played for 30 hours
Angry Birds Space played for 15 hours
5000 birds launched
5000 stone blocks smashed
5000 wooden blocks smashed
50 000 blocks smashed
1000 pigs smashed
100 birds exited atmosphere
Angry Birds Space played for 5 hours
1000 bubbles popped
5000 ice blocks smashed
3 pig freezes with one ice bird
Pig popped with another pig
100 pigs popped in the main menu
Bird shot into a lagrangian point
All credits name bubbles popped